I am pretty sure Fox supplied Lustrox with one or two of my combat engines. Some of my old CL buddies said that Jewelers rouge works for a lapping compound.
One of these days I need to break down and get a couple of Fora CL combat .049's. Kinda sad, I will be at the AMA Nats this summer, at the same time as combat, but will be flying another event. Last year an old buddy let me fly one of his FAI Fora .15 powered combat models. What a treat that was. Right before I left to head home as well. That made me smile for the trip home.